/*
 * Copyright (C) 2021 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.sentry.samples.spring;

import io.sentry.spring.tracing.SentryTracingFilter;

import javax.servlet.Filter;

import org.springframework.web.filter.DelegatingFilterProxy;
import org.springframework.web.filter.RequestContextFilter;
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

/**
 * AppInitializer
 *
 * @since 2021-05-24
 */
public class AppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

    @Override
    protected String[] getServletMappings() {
        return new String[]{"/*"};
    }

    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class<?>[]{AppConfig.class, SecurityConfiguration.class};
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class<?>[]{WebConfig.class};
    }

    @Override
    protected Filter[] getServletFilters() {
        // creates Sentry transactions around incoming HTTP requests
        SentryTracingFilter sentryTracingFilter = new SentryTracingFilter();

        // filter required by Spring Security
        DelegatingFilterProxy springSecurityFilterChain = new DelegatingFilterProxy();
        springSecurityFilterChain.setTargetBeanName("springSecurityFilterChain");
        // sets request on RequestContextHolder
        RequestContextFilter requestContextFilter = new RequestContextFilter();

        // sets Sentry user on the scope
        DelegatingFilterProxy sentryUserFilterProxy = new DelegatingFilterProxy();
        sentryUserFilterProxy.setTargetBeanName("sentryUserFilter");

        return new Filter[]{
            sentryTracingFilter, springSecurityFilterChain, requestContextFilter, sentryUserFilterProxy
        };
    }
}
